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Can you explain why the column of mercur...

Can you explain why the column of mercury first descends and then rises when a mercury in glass thermometers put in a flame?

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To explain why the column of mercury first descends and then rises when a mercury-in-glass thermometer is placed in a flame, we can break down the process into several steps: ### Step-by-Step Solution: 1. **Initial Placement in Flame**: When the thermometer is placed in a flame, both the glass and the mercury inside it start to absorb heat. 2. **Expansion of Glass**: The glass of the thermometer expands more quickly than the mercury. This is because the thermal expansion coefficient of glass is lower than that of mercury. Therefore, as the glass heats up, it expands and creates more space for the mercury. ...
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